Using Liquibase with IBM DB2 LUW

IBM DB2 LUW (DB2 for Linux, Unix, and Windows) is a cross-platform database management system created by IBM. For more information, see IBM DB2 Documentation.

Verified versions

  • 11.5.7+

Verification level

Note: A database's verification level indicates how well it works with different features in Liquibase and across different products, such as Liquibase Open Source and Liquibase Pro. For more information, see Database Verification Levels.

Advanced: Database has been tested and validated to deliver a minimum set of advanced capabilities around database inspection, support for long-running operations, as well as the Foundational level's basic functionality of change management and change tracking aligned with the database. The advanced database inspection capabilities include the ability to generate changelogs in at least one format and the support of at least two additional state-based commands (snapshots, diffs, etc). The Liquibase customer support team provides how-to/usage support around verified capabilities for commercial customers.

Prerequisites

  1. Introduction to Liquibase – Dive into Liquibase concepts.
  2. Install Liquibase – Download Liquibase on your machine.
  3. Get Started with Liquibase – Learn how to use Liquibase with an example database.
  4. Design Your Liquibase Project – Create a new Liquibase project folder and organize your changelogs
  5. How to Apply Your Liquibase Pro License Key – If you use Liquibase Pro, activate your license.

Install drivers

To use Liquibase and IBM DB2 LUW, you need two files:

The latest version of Liquibase has a pre-installed driver for this database in the liquibase/internal/lib directory, so you don't need to install it yourself. If you use Maven, you must include the driver JAR as a dependency in your pom.xml file. 

<dependency>
    <groupId>com.ibm.db2</groupId>
    <artifactId>jcc</artifactId>
    <version>11.5.7.0</version>
</dependency>
<dependency>
    <groupId>org.liquibase.ext</groupId>
    <artifactId>liquibase-db2i</artifactId>
    <version>4.21.1</version>
</dependency>

Test your connection

  1. Ensure your IBM DB2 LUW database is configured. See Verifying the Installation for more information.
  2. Specify the database URL in the liquibase.properties file (defaults file), along with other properties you want to set a default value for. Liquibase does not parse the URL. You can either specify the full database connection string or specify the URL using your database's standard JDBC format:
    3. url: jdbc:db2://<server_name>:<port>/<db_name>

    Tip: To apply a Liquibase Pro key to your project, add the following property to the Liquibase properties file: licenseKey: <paste code here>

  1. Create a text file called changelog (.xml) in your project directory and add a changeset.

    If you already created a changelog using the init project command, you can use that instead of creating a new file. When adding onto an existing changelog, be sure to only add the changeset and to not duplicate the changelog header.

    2. <?xml version="1.0" encoding="UTF-8"?>
<databaseChangeLog
    xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext"
    xmlns:pro="http://www.liquibase.org/xml/ns/pro"
    xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
        http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd
        http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd
        http://www.liquibase.org/xml/ns/pro http://www.liquibase.org/xml/ns/pro/liquibase-pro-latest.xsd">

    <changeSet id="1" author="Liquibase">
        <createTable tableName="test_table">
            <column name="test_id" type="int">
                <constraints primaryKey="true"/>
            </column>
            <column name="test_column" type="varchar"/>
        </createTable>
    </changeSet>

</databaseChangeLog>
    -- liquibase formatted sql

-- changeset liquibase:1
CREATE TABLE test_table (test_id INT, test_column VARCHAR(255), PRIMARY KEY (test_id))

    Tip: Formatted SQL changelogs generated from Liquibase versions before 4.2 might cause issues because of the lack of space after a double dash ( -- ). To fix this, add a space after the double dash. For example: -- liquibase formatted sql instead of --liquibase formatted sql and -- changeset myname:create-table instead of --changeset myname:create-table.

    databaseChangeLog:
   - changeSet:
       id: 1
       author: Liquibase
       changes:
       - createTable:
           tableName: test_table
           columns:
           - column:
               name: test_column
               type: INT
               constraints:
                   primaryKey:  true
                   nullable:  false
    {
  "databaseChangeLog": [
    {
      "changeSet": {
        "id": "1",
        "author": "Liquibase",
        "changes": [
          {
            "createTable": {
              "tableName": "test_table",
              "columns": [
                {
                  "column": {
                    "name": "test_column",
                    "type": "INT",
                    "constraints": {
                      "primaryKey": true,
                      "nullable": false
                    }
                  }
                }
              ]
            }
          }
        ]
      }
    }
  ]
}
  2. Navigate to your project folder in the CLI and run the Liquibase status command to see whether the connection is successful:
    3. liquibase status --username=test --password=test --changelog-file=<changelog.xml>

    Note: You can specify arguments in the CLI or keep them in the Liquibase properties file.

    If your connection is successful, you'll see a message like this:

    4 changesets have not been applied to <your_jdbc_url>
Liquibase command 'status' was executed successfully.
  3. Inspect the deployment SQL with the update-sql command:
    4. liquibase update-sql --changelog-file=<changelog.xml>
  4. Then make changes to your database with the update command:
    5. liquibase update --changelog-file=<changelog.xml>

    If your update is successful, Liquibase runs each changeset and displays a summary message ending with:

    Liquibase: Update has been successful.
Liquibase command 'update' was executed successfully.
  5. From a database UI tool, ensure that your database contains the test_table object you added along with the DATABASECHANGELOG table and DATABASECHANGELOGLOCK table.

Now you're ready to start making deployments with Liquibase!

Related links